Furnace



(No Model.) v 2 Shs,8heet 0. H. G-RBWOOX & F. YEITER.

FURNACE.

Patent-ed Nov. 23, 1886.

C. H, GBEWOOX & P. YEITER. FURNA'GH' No. 353,216. Patented Nov. 23,1886.

(No Model.) 2 Sheets-Sheet 2,

NY PETERS, Phowi'rthographur. Washington, 0. c

UNITED STATES PATENT OFFICE.

CHARLES H. GREWCOX AND FRED YEITER, OF BRAINERD, MINNESOTA.

FURNACE.

SPECIFICATION forming part of Letters Patent N0. 353,216, dated November23, 1886,

Application filed May 18, 1886. Serial No. 202,547. (No model.)

To aZZ whom it may concern:

Be it known that we, CHARLES H. GREW- COX and FRED YEITER, citizens ofthe United States, residing at Brainerd, in the county of Grow Wing andState of Minnesota, have invented certain new and useful Improvements inFurnaces, of which the following is a specification, rel'erencebeing hadtherein to the accompanying drawings.

Thisinvention has relation to improvements upon ourimprovedsmoke-consuming furnace for which Letters Patent were granted to usSeptember30,lS84,No. 305, 918, the presentinvention having referencemore particularly to the appliance proper for consuming the smoke orother products of combustion; and it consists of the combination, withthe furnace'wall, including the bridge-wall thereof, wherein air inletsor passages are provided, of steam-injecting pipes arranged in differentplanes of elevation and adapted to inject steam into thefurnace-chamber, substantially as hereinafter more fully set forth, andpointed out in the claims.

In the accompanying drawings, Figure 1 is a side elevation of a boilerand its furnace with our invention applied thereto, a portion of theside wall of the furnace being broken away and its front and bridge wallbeing shown in section. Fig. 2 is a front elevation thereof, and Fig. 3isasectional elevation taken on the line as a: of Fig. 1.

In carrying out our invention we construct the front wall of the furnacewith an air-passage, a, with its lower ends connecting with air-inlets aa at the lower front end of the furnace, one near each side, whichpassage extends up over the door-openings and connects at a point aboutintermediately of the said door-openings and at the upper corners ofsaid passage wit-lithe combustion-chamber by short pipes a A11air-passage, b, is provided in the bridgewall B, which connects theinlet 1) with the horizontal passage, with which the short pipes bopening in the combustion-chamber, connect.

Ois a steam-pipe connecting with the steamdome of the boiler, andbranching off into arms 0 c, which extend. down at one side of thefurnace, one arm connecting with a pipe, 0', extending along andcontinuously to the front of the furnace, and having a numberofjet-pipes, d, projecting into the short pipes a while the other arm ofthe pipe 0 connects with a pipe, 0 extending into the horizontal portionof the passage a, and having a series ofjet-pipes, e, which project intothe short pipes b It will be observed that the two series ofjetpipes d eare arranged in different planes of elevation, the front series, d,being preferably the higher, whereby thejets of steam issuing therefrominto the con'ibustion-chaniber will, instead of meeting, as wouldotherwise be the case, pass each other and set up a continuouscirculation of air-currents, as indicated by the numerous arrows, andthnsproduce a strong suction at the air-inlets both at the rear andfront of the furnace, which will create an in creased draft to the fuel,to effect thethorough consumption of the smoke andother liberatedproducts of combustion.

\Nhat we claim is- 1. In a smokeconsuming furnace, the combination, withthe fire-box and front and rear steam-pipes, of the front wall having anairpassage connecting with an air-inlet in said wall and with thecombustion-chamber above the grate, a transverse bridge-wall having anair-passage connecting the air-spacein the rear of said wall with thecombustionchamber, substantially as shown and described.

- 2. In a snioke-consuming chamber, the combination, with a steam-pipeand acombustionchamber having an air-passage in its front wall and anair-passage in its bridge-wall connecting the space in rear of said wallwith the combustion-chamber, of the two series of steam-jet pipesdisposed in different planes of elevation and projecting into shortpipes of said air-passages, which pipes open into the combusti0nchamber,substantially as and for the purpose set forth.

In testimony whereof we aflix our signatures in presence of twowitnesses.

CHARLES H. GREYVCOX. FRED YEITER. Witnesses:

WILLIAM LOUIS KELLY, WILLIAM LoUIs KELLY, J r.

